Hi C-
I don't know of support groups in NY or close to there, I live on the other side of the US (Arizona). There are several on-line support groups, here are a few of them. Some of the websites out there can be very negative towards BPD, but I personally felt the MHS Sanctuary was the best, it has lots of info. I hope this helps!
http://www.bpdresources.com/index.html http://www.mhsanctuary.com/borderline/index.html http://www.bpdcentral.com/